This article is about the Italian municipality. For the astronomer, see Paolo Chiavenna.Chiavenna (Lombard: Ciavèna, Latin and Romansh: Clavenna or Claven, archaic German: Cläven or Kleven is a comune (municipality) in the Province of Sondrio in the Italian region of Lombardy. It is the centre of the Alpine Valchiavenna region. The historic town is a member of the Cittaslow movement.